예제 #1
0
func (this *Store) readFile(filename string) (body []byte, err error) {
	body, err = ioutil.ReadFile(filename)
	if err != nil {
		if os.IsNotExist(err) {
			log.Debug(fmt.Sprintf("file store: not found: %s", filename))
			err = stores.ErrNoItem
		}
		return
	}

	log.Debug(fmt.Sprintf("file store: load: %s", filename))
	return
}
예제 #2
0
func main() {
	port := flag.Uint("port", 8000, "the port on which the server listens")
	tilesetRoot := flag.String("dir", ".", "the root directory under which tileset directories reside")
	webRoot := flag.String("web-dir", "", "(optional) the root directory containing static files to be served")
	memcached := flag.String("memcached", "", "(optional) memcached connection string for caching tiles e.g. localhost:11211")
	baseTerrainUrl := flag.String("base-terrain-url", "/tilesets", "base url prefix under which all tilesets are served")
	noRequestLog := flag.Bool("no-request-log", false, "do not log client requests for resources")
	logging := NewLogOpt()
	flag.Var(logging, "log-level", "level at which logging occurs. One of crit, err, notice, debug")
	limit := NewLimitOpt()
	limit.Set("1MB")
	flag.Var(limit, "cache-limit", `the memory size in bytes beyond which resources are not cached. Other memory units can be specified by suffixing the number with kB, MB, GB or TB`)
	flag.Parse()

	// Set the logging
	log.SetLog(l.New(os.Stderr, "", l.LstdFlags), logging.Priority)

	// Get the tileset store
	store := fs.New(*tilesetRoot)

	r := mux.NewRouter()
	r.HandleFunc(*baseTerrainUrl+"/{tileset}/layer.json", myhandlers.LayerHandler(store))
	r.HandleFunc(*baseTerrainUrl+"/{tileset}/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.terrain", myhandlers.TerrainHandler(store))
	if len(*webRoot) > 0 {
		log.Debug(fmt.Sprintf("serving static resources from %s", *webRoot))
		r.PathPrefix("/").Handler(http.FileServer(http.Dir(*webRoot)))
	}

	handler := myhandlers.AddCorsHeader(r)
	if len(*memcached) > 0 {
		log.Debug(fmt.Sprintf("memcached enabled for all resources: %s", *memcached))
		handler = myhandlers.NewCache(*memcached, handler, limit.Value, myhandlers.NewLimit)
	}

	if *noRequestLog == false {
		handler = handlers.CombinedLoggingHandler(os.Stdout, handler)
	}

	http.Handle("/", handler)

	log.Notice(fmt.Sprintf("server listening on port %d", *port))
	if err := http.ListenAndServe(fmt.Sprintf(":%d", *port), nil); err != nil {
		log.Crit(fmt.Sprintf("server failed: %s", err))
		os.Exit(1)
	}
}
예제 #3
0
func (this *Cache) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	var limiter ResponseLimiter
	var recorder http.ResponseWriter
	rec := NewRecorder()

	// If a limiter is provided, wrap the recorder with it.
	if this.limiter != nil {
		limiter = this.limiter(rec, this.Limit)
		recorder = limiter
	} else {
		recorder = rec
	}

	// Write to both the recorder and original writer.
	tee := MultiWriter(w, recorder)
	this.handler.ServeHTTP(tee, r)

	// Only cache 200 responses.
	if rec.Code != 200 {
		return
	}

	// If the cache limit has been exceeded, don't proceed to cache the
	// response.
	if limiter != nil && limiter.LimitExceeded() {
		log.Debug(fmt.Sprintf("cache limit exceeded for %s", r.URL.String()))
		return
	}

	// Cache the response.
	key := this.generateKey(r)
	log.Debug(fmt.Sprintf("setting key: %s", key))
	if err := this.mc.Set(&memcache.Item{Key: key, Value: rec.Body.Bytes()}); err != nil {
		log.Err(err.Error())
	}

	return
}